Optical lens and method of assembling the same

Abstract

The present application discloses an optical lens and an assembling method thereof, wherein the assembling method comprises the following steps: (a) allowing a plurality of lens groups to be arranged substantially coaxially; (b) calibrating the Z-direction gap of the lens groups; (c) sequentially calibrating the XY-direction position of the lens groups from low to high according to the sensitivity of the lens groups in the whole optical lens; and (d) assembling the calibrated lens groups to obtain the optical lens.

Description

Technical Field

[0001] This invention relates to optical imaging devices, and more particularly to an optical lens and its assembly method. Background Technology

[0002] An optical lens is an essential component of a camera module, converging incident light to create an image. In recent years, as users' demands for image quality have increased, the pixel count of camera modules has also been continuously improving. Simultaneously, the design requirements for optical lenses have become increasingly stringent. Existing camera modules are equipped with integrated optical lenses, comprising a lens barrel and multiple lens elements housed within that barrel. Due to the technological limitations of the design and assembly methods of integrated optical lenses, camera modules with integrated optical lenses struggle to meet the requirements for large apertures. To address the aforementioned problems with integrated optical lenses, the industry has proposed a split optical lens. This design divides the series of lens elements into at least two lens groups. Each lens group includes a lens barrel and at least one lens element mounted within that barrel. Each lens group is assembled and calibrated separately before being assembled into a complete optical lens. While this type of split optical lens offers advantages that integrated optical lenses lack, it still requires a driver (e.g., a voice coil motor) to move along the optical axis of the camera module for focusing. This limits the size of the camera module at the lens's location, making it difficult to reduce its size for use on the front of electronic devices. In other words, even with the newly developed split optical lens, the camera module is unsuitable as a front-facing camera module for electronic devices. Summary of the Invention

[0003] One object of the present invention is to provide an optical lens and a method for assembling the same, wherein a plurality of lens groups of the optical lens are arranged along the optical axis of the camera module, thereby enabling the camera module to have a large aperture during shooting.

[0004] One object of the present invention is to provide an optical lens and an assembly method thereof, wherein a plurality of lens groups of the optical lens are arranged in order of sensitivity by active alignment, first adjusting the gap of the lens groups in the Z direction, and then adjusting the position of the lens groups in the XY direction, so that the optical lens can be assembled under high threshold performance, thereby improving the imaging performance of the optical lens.

[0005] One object of the present invention is to provide an optical lens and a method for assembling the same, wherein the optical lens is adjusted sequentially in the XY direction according to the sensitivity of each lens group in the overall optical lens from low to high, thereby enabling the optical lens to be assembled at a high threshold performance, which is beneficial to improving the imaging performance of the optical lens.

[0006] One object of the present invention is to provide an optical lens and an assembly method thereof, wherein the optical lens has a built-in focusing function, so that the camera module does not need to change the position and size of the entire optical lens when focusing, but only needs to drive a portion of the lens group to move along the optical axis of the camera module to achieve focusing of the camera module.

[0007] One object of the present invention is to provide an optical lens and an assembly method thereof, wherein the optical lens provides a housing and a driving mechanism, the driving mechanism driving a focusing lens group to move along the optical axis of the camera module inside the housing to achieve focusing of the camera module. Thus, on the one hand, the optical lens is allowed to have a built-in focusing function, and on the other hand, it helps to simplify the assembly steps of the camera module and improve the assembly accuracy of the camera module.

[0008] One object of the present invention is to provide an optical lens and a method for assembling the same, wherein an upper lens group of the optical lens protrudes from the housing and the upper lens group is small in size to allow the optical lens to adopt a "small head" design. Thus, when the camera module is used as a front-facing camera module of an electronic device, the upper lens group of the optical lens can be closer to the opening position of the screen of the electronic device, thereby enabling the camera module to obtain a larger field of view and light transmission, thereby improving the imaging quality of the camera module.

[0009] One object of the present invention is to provide an optical lens and a method for assembling the same, wherein the coil of the drive mechanism is recessed to reduce the height of the camera module, thereby making the camera module suitable for electronic devices that require a thinner and lighter design.

[0010] One object of the present invention is to provide an optical lens and a method for assembling the same, wherein the driving mechanism provides a carrier portion, a carrier ring of the carrier portion for carrying the focusing lens group is held on the upper side of a lower lens group below the optical lens, and a driven member of the carrier portion for fixing the coil surrounds the outer side of the lower lens group, thereby enabling the coil to be lowered and thus facilitating a reduction in the height of the camera module.

[0011] One object of the present invention is to provide an optical lens and a method of assembling the same, wherein the housing has at least one clearance space to allow at least one extension arm of the carrier portion for connecting the carrier ring and the driven member, such that the focusing lens group is allowed to have a greater range of travel.

[0012] According to one aspect of the present invention, the present invention provides a method for assembling an optical lens, wherein the assembly method includes the following steps:

[0013] (a) Allows multiple lens groups to be set approximately on the same optical axis;

[0014] (b) Calibrate the gaps in the Z direction of these lens groups;

[0015] (c) The positions of the lens groups in the XY directions are calibrated sequentially according to their sensitivity in the overall optical lens system, from low to high; and

[0016] (d) Assemble the calibrated lens group to obtain the optical lens.

[0017] According to one embodiment of the present invention, these lens groups are respectively an upper lens group, a focusing lens group, and a lower lens group, wherein step (b) further includes the step of:

[0018] (b.1) Using the lower lens group as a reference, calibrate the gap in the Z direction of the focusing lens group;

[0019] (b.2) Using the lower lens group and the focusing lens group as a reference, correct the gap in the Z direction of the upper lens group;

[0020] The step (c) further includes the step of:

[0021] (c.1) Using the lower lens group as a reference, correct the position of the focusing lens group in the XY directions; and

[0022] (c.2) Using the lower lens group and the focusing lens group as a reference, correct the position of the upper lens group in the XY direction.

[0023] According to an embodiment of the present invention, step (a) further includes the step of:

[0024] (a.1) A drive mechanism on which the focusing lens group is assembled is disposed in a housing space of the housing such that the focusing lens group corresponds to a top opening of a housing;

[0025] (a.2) The lower lens group is fixedly disposed in the housing space of the housing such that the lower lens group corresponds to the focusing lens group; and

[0026] (a.3) The upper lens group is pre-fixed to the housing in such a way that the upper lens group corresponds to the top opening of the housing, so as to allow the upper lens group, the focusing lens group and the lower lens group to be arranged substantially coaxially.

[0027] According to one embodiment of the invention, in step (a.1), at least one extension arm of the drive mechanism is allowed to correspond to at least one clearance space of the housing communicating with the top opening and the housing space.

[0028] According to one embodiment of the present invention, after calibrating the lower lens group, the focusing lens group and the upper lens group, a cover that is attached to the housing is allowed to close the clearance space.

[0029] According to another aspect of the present invention, the present invention further provides a method for assembling an optical lens, wherein the assembly method includes the following steps:

[0030] (A) A housing is provided, wherein the housing has a housing space and a top opening and a bottom opening respectively communicating with the housing space;

[0031] (B) A drive mechanism for assembling a focusing lens group is disposed on the housing via the bottom opening of the housing, so as to allow the focusing lens group to be movably held in the housing space of the housing in a manner corresponding to the top opening of the housing; and

[0032] (C) A lower lens group is fixedly disposed in the housing space of the housing through the bottom opening of the housing, and an upper lens group is attached to the housing to obtain the optical lens, wherein the upper lens group, the focusing lens group and the lower lens group are arranged sequentially along the optical axis of the optical lens.

[0033] According to one embodiment of the present invention, in step (C), firstly, the upper lens group is pre-fixed to the housing; secondly, the upper lens group, the focusing lens group, and the lower lens group are calibrated; and thirdly, the upper lens group is fixed to the housing.

[0034] According to an embodiment of the present invention, in the above method, firstly, the gap in the Z direction of the focusing lens group is calibrated based on the lower lens group; secondly, the gap in the Z direction of the upper lens group is corrected based on the lower lens group and the focusing lens group; thirdly, the position in the XY direction of the focusing lens group is corrected based on the lower lens group; and finally, the position in the XY direction of the upper lens group is corrected based on the lower lens group and the focusing lens group.

[0035] According to one embodiment of the present invention, the housing is provided with at least one mounting arm and at least one movable channel communicating with opposite sides of the mounting arm in the housing space, wherein in step (B), at least one extension arm of the drive mechanism is movably held in the movable channel of the housing, and wherein in step (C), the lower lens group is fixedly mounted to the mounting arm of the housing.

[0036] According to one embodiment of the present invention, in step (C), the outer and inner sides of a substrate are respectively fixedly mounted to the housing and the lower lens group, so that the lower lens group is fixedly disposed in the housing space of the housing by the substrate.

[0037] According to one embodiment of the present invention, in step (C), a driven member of a carrier portion of the drive mechanism surrounds the outer side of the lower lens group.

[0038] According to one embodiment of the present invention, in step (B), at least one extension arm of a bearing portion of the drive mechanism corresponds to at least one clearance space of the housing communicating with the top opening and the housing space.

[0039] According to one embodiment of the present invention, in step (C), a cover attached to the housing is allowed to close the clearance space. Attached Figure Description

[0040] Figure 1 This is a cross-sectional schematic diagram of a camera module according to a preferred embodiment of the present invention.

[0041] Figure 2 This is a perspective view of an optical lens of the camera module according to the above-described preferred embodiment of the present invention.

[0042] Figure 3A It is along Figure 2 A schematic diagram of the internal structure after being cut along line AA.

[0043] Figure 3B It is along Figure 2 A schematic diagram of the internal structure after being cut along the BB line.

[0044] Figure 4A This is an exploded view of the optical lens of the camera module according to the above-described preferred embodiment of the present invention.

[0045] Figure 4B This is an exploded view of the optical lens of the camera module according to the above-described preferred embodiment of the present invention from another perspective.

[0046] Figure 5AThis is a cross-sectional schematic diagram of one state of the camera module according to the above-described preferred embodiment of the present invention.

[0047] Figure 5B This is a cross-sectional schematic diagram of another state of the camera module according to the above-described preferred embodiment of the present invention.

[0048] Figure 6 This is a cross-sectional schematic diagram of a modified embodiment of the camera module according to the above-described preferred embodiment of the present invention.

[0049] Figure 7 This is a cross-sectional schematic diagram of another modified embodiment of the camera module according to the above-described preferred embodiment of the present invention. Detailed Implementation

[0050] Before detailing any embodiment of the invention, it should be understood that the invention is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the following figures. The invention can have other embodiments and can be practiced or carried out in various ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising,” “including,” or “having,” and variations thereof is intended to cover the items set forth below and their equivalents, as well as any additional items. Unless otherwise specified or limited, the terms “installation,” “connection,” “support,” and “linkage,” and variations thereof are used broadly and cover both direct and indirect installation, connection, support, and linking. Moreover, “connection” and “linkage” are not limited to physical or mechanical connections or links.

[0051] Furthermore, firstly, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention. Secondly, the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0052] Refer to the accompanying drawings of the specification of this invention. Figures 1 to 5BA camera module according to a preferred embodiment of the present invention will be disclosed and described in the following description, wherein the camera module includes a photosensitive component 100 and an optical lens 200 disposed on the photosensitive component 100, wherein the optical lens 200 includes a plurality of lens groups 201 arranged along the optical axis of the camera module, thereby realizing the large aperture function of the camera module during the shooting process.

[0053] Specifically, see the attached document. Figure 1 , Figure 5A and Figure 5B The photosensitive assembly 100 includes a circuit board 101, a photosensitive chip 102, a lens mount 103, and a filter 104. The photosensitive chip 102 is mounted on the circuit board 101. The lens mount 103 is disposed on the circuit board 101 such that it at least surrounds the photosensitive area of ​​the photosensitive chip 102. The filter 104 is mounted on the top side of the lens mount 103 such that it is held in the photosensitive path of the photosensitive chip 102. The optical lens 200 is directly disposed on the lens mount 103. Incident light, after passing sequentially through each lens group 201 of the optical lens 20 and through the filter 104, can be received by the photosensitive chip 102, so that the photosensitive chip 102 can subsequently perform photoelectric conversion to form an image.

[0054] Preferably, the lens mount 103 is integrally formed on the circuit board 101. This eliminates the need for an adhesive layer between the lens mount 103 and the circuit board 101, reducing the height of the camera module. Furthermore, the lens mount 103 reinforces the circuit board 101, ensuring its flatness. Preferably, the lens mount 103 may further embed a portion of the non-photosensitive area of ​​the photosensitive chip 102, thus integrally combining the lens mount 103 with both the circuit board 101 and the photosensitive chip 102.

[0055] In addition, the photosensitive component 100 further includes at least one electronic component 105, wherein the electronic component 105 is mounted on the circuit board 101, and the lens mount 103 may embed the electronic component 105.

[0056] Continue to refer to the appendix Figures 1 to 5BThe lens groups 201 of the optical lens 200 are defined as an upper lens group 10, a focusing lens group 20, and a lower lens group 30. In other words, the optical lens 200 includes the upper lens group 10, the focusing lens group 20, and the lower lens group 30, wherein the upper lens group 10, the focusing lens group 20, and the lower lens group 30 are arranged sequentially along the optical axis of the camera module to allow incident light to be received by the photosensitive chip 102 after passing sequentially through the upper lens group 10, the focusing lens group 20, and the lower lens group 30 of the optical lens 200 and through the filter 104. The focusing lens group 20 is allowed to move along the optical axis of the camera module to achieve focusing during the shooting process of the camera module.

[0057] Further, the optical lens 200 includes a housing 40 having a housing space 41 and a top opening 42 and a bottom opening 43 respectively communicating with the housing space 41. The focusing lens group 20 is movably arranged in the housing space 41 of the housing 40, and the focusing lens group 20 corresponds to the top opening 42 of the housing 40. The lower lens group 30 is fixedly arranged in the housing space 41 of the housing 40, such that when the focusing lens group 20 is driven to move along the optical axis of the camera module, the relative positions of the focusing lens group 20 and the lower lens group 30 are adjusted. The upper lens group 10 is mounted to the housing 40 such that the upper lens group 10 corresponds to the top opening 42 of the housing 40, allowing the upper lens group 10 to protrude from the housing 40. (Refer to the attached diagram.) Figures 1 to 5B The upper lens group 10 is relatively small in size, which allows the optical lens 200 to adopt a "small head" design. Thus, when the camera module is used as the front camera module of an electronic device, the upper lens group 10 of the optical lens 200 can be closer to the opening position of the screen of the electronic device, which is conducive to the camera module obtaining a larger field of view and light transmission, thereby improving the imaging quality of the camera module.

[0058] Specifically, the upper lens group 10 includes a first lens barrel 11 and at least one first lens element 12 mounted on the first lens barrel 11, wherein the first lens barrel 11 is attached to the housing 40 to mount the upper lens group 10 to the housing 40. The focusing lens group 20 includes a second lens barrel 21 and at least one second lens element 22 mounted on the second lens barrel 21. The lower lens group 30 includes a third lens barrel 31 and at least one third lens element 33 mounted on the third lens barrel 31, wherein the third lens barrel 31 is mounted to the housing 40 to fix the lower lens group 30 in the housing space 41 of the housing 40.

[0059] Specifically, see the attached document. Figure 1 Appendix Figures 3B to 4B The housing 40 includes a shell body 44, a surrounding body 45, and at least one mounting arm 46. The surrounding body 45 extends integrally downward from the periphery of the shell body 44 to form the housing space 41 of the housing 40 between the surrounding body 45 and the shell body 44, and defines the bottom opening 43 of the housing 40 by the surrounding body 45, wherein the top opening 42 of the housing 40 is formed in the shell body 44, and wherein the first lens barrel 11 of the upper lens group 10 is attached to the shell body 44 of the housing 40. The mounting arm 46 extends integrally downward from the inner wall of the shell body 44 such that the mounting arm 46 is located in the housing space 41 of the housing 40, wherein the third lens barrel 31 of the lower lens group 30 is mounted on the mounting arm 46 of the housing 40 to fix the lower lens group 30 in the housing space 41 of the housing 40.

[0060] Preferably, the housing 40 includes two mounting arms 46 that extend integrally downward from the inner wall of the housing body 44 in a spaced-apart and symmetrical manner to form two movable channels 47 between the two mounting arms 46. It is understood that the movable channels 47 connect the spaces on opposite sides of the mounting arms 46.

[0061] It is worth mentioning that the mounting method of the third lens barrel 31 of the lower lens group 30 and the mounting arm 46 of the housing 40 is not limited in the optical lens 200 of the present invention. For example, the third lens barrel 31 of the lower lens group 30 and the mounting arm 46 of the housing 40 can be mounted by means of, but not limited to, adhesive bonding.

[0062] Preferably, refer to the appendix Figure 4A and Figure 4B The mounting arm 46 of the housing 40 has at least one slot 461, and correspondingly, the third lens barrel 31 of the lower lens group 30 has at least one protrusion 311, wherein the protrusion 311 of the third lens barrel 31 is engaged with the slot 461 of the mounting arm 46. The lower lens group 30 can be reliably mounted on the housing 40 by means of the mutual cooperation between the protrusion 311 of the third lens barrel 31 and the slot 461 of the mounting arm 46, so as to prevent the lower lens group 30 from rotating relative to the housing space 41 of the housing 40.

[0063] Specifically, each of the mounting arms 46 of the housing 40 has two slots 461, which are formed on opposite sides of the mounting arm 46. Correspondingly, the third lens barrel 31 of the lower lens group 30 has four protrusions 311, wherein each protrusion 311 of the third lens barrel 31 is respectively engaged in each slot 461 of the mounting arm 46.

[0064] Optionally, the slot 461 is formed in the third lens barrel 31, and the protrusion 311 is formed in the mounting arm 46, wherein the protrusion 311 of the mounting arm 46 is engaged with the slot 461 of the third lens barrel 31. The lower lens group 30 can be reliably mounted on the housing 40 by the mutual cooperation between the protrusion 311 of the mounting arm 46 and the slot 461 of the third lens barrel 31, so as to prevent the lower lens group 30 from rotating relative to the housing space 41 of the housing 40.

[0065] Continue to refer to the appendix Figures 1 to 5B The optical lens 200 further includes a drive mechanism 50, which includes a fixing part 51, a support part 52, and a drive part 53. The drive part 53 is configured to drive the support part 52 to move relative to the fixing part 51. The fixing part 51 is fixedly disposed on the surrounding body 45 of the housing 40. The support part 52 has a support outer side 5201 and a support inner side 5202 corresponding to the support outer side 5201. The support outer side 5201 of the support part 52 extends to a position adjacent to the fixing part 51, and the support inner side 5202 of the support part 52 extends to the upper side of the lower lens group 30. The focusing lens group 20 is fixedly disposed on the support inner side 5202 of the support part 52, so that the support part 52 is used to hold the focusing lens group 20 on the upper side of the lower lens group 30. When the driving unit 53 drives the bearing unit 52 to move relative to the fixed unit 51 from the bearing outer side 5201 of the bearing unit 52, the focusing lens group 20 is allowed to move along the optical axis of the camera module to achieve focusing of the camera module.

[0066] It is worth mentioning that the manner in which the supporting portion 52 holds the focusing lens group 20 above the lower lens group 30 is not limited in the optical lens 200 of the present invention. For example, refer to the attached drawing. Figure 1 , Figure 5A and Figure 5BThe optical lens 200 of the present invention may include at least one spring 202, wherein the outer side of the spring 202 extends to and is fixed to the fixing portion 51, and the inner side of the spring 202 extends to and is fixed to the bearing outer side 5201 of the bearing portion 52. Thus, the spring 202 and the bearing portion 52 cooperate to allow the focusing lens group 20 to be suspended and held above the lower lens group 30, thereby ensuring that the focusing lens group 20 is in a relatively stable state when the camera module is not in operation. When the driving portion 53 drives the bearing portion 52 to move the focusing lens group 20 upward along the optical axis of the camera module, the spring 202 deforms upward synchronously. Correspondingly, when the driving portion 53 drives the bearing portion 52 to move the focusing lens group 20 downward along the optical axis of the camera module, the spring 202 deforms downward synchronously.

[0067] It is worth mentioning that the number of springs 202 in the optical lens 200 of the present invention is not limited. For example, in this preferred example of the optical lens 200 of the present invention, the optical lens 200 includes one spring 202, the outer side of which extends to and is fixedly connected to the upper side of the fixing part 51, and the inner side of which extends to and is fixedly connected to the upper side of the driven member 521; or, the outer side of which extends to and is fixedly connected to the lower side of the fixing part 51, and the inner side of which extends to and is fixedly connected to the lower side of the driven member 521. Optionally, in other examples of the optical lens 200 of the present invention, the optical lens 200 includes two springs 202, one spring 202 extending outward to and fixedly connected to the upper side of the fixing part 51, and extending inward to and fixedly connected to the upper side of the driven member 521, and the other spring 202 extending outward to and fixedly connected to the lower side of the fixing part 51, and extending inward to and fixedly connected to the lower side of the driven member 521.

[0068] For details, please refer to the appendix. Figures 1 to 5BThe driving unit 53 further includes at least one magnet 531 and at least one coil 532. The magnet 531 is fixedly disposed on the fixed part 51, and the coil 532 is fixedly disposed on the outer side 5201 of the bearing part 52. The positions of the magnet 531 and the coil 532 correspond to each other. When the coil 532 is powered, the magnetic field generated by the coil 532 interacts with the magnet 531 to drive the bearing part 52 to move relative to the fixed part 51. In this way, the bearing part 52 drives the focusing lens group 20 to move along the optical axis of the camera module to achieve focusing of the camera module.

[0069] It is worth mentioning that the coil 532 of the driving unit 53 can be electrically connected to the circuit board 101 of the photosensitive component 100 to allow power to be supplied to the coil 532 of the driving unit 53 through the circuit board 101.

[0070] Optionally, in other examples of the optical lens 200 of the present invention, the magnet 531 of the driving part 53 is fixedly disposed on the outside of the support part 52, and correspondingly, the coil 532 is fixedly disposed on the fixing part 51, and the positions of the magnet 531 and the coil 532 correspond to each other, wherein when the coil 532 of the driving part 53 is powered, the magnetic field generated by the coil 532 interacts with the magnet 531 to drive the support part 52 to move relative to the fixing part 51.

[0071] Continue to refer to the appendix Figures 1 to 5B The fixing part 51 is annular and located outside the focusing lens group 20. The driving part 53 includes two magnets 531, which are symmetrically arranged on opposite sides of the fixing part 51, thus symmetrically located outside the focusing lens group 20. The bearing part 52 has an annular bearing outer side 5201, located outside the focusing lens group 20. The driving part 53 includes a coil 532, which is wound around the bearing outer side 5201 of the bearing part 52, thus annular and located outside the focusing lens group 20. With the above structure, when the coil 532 is powered, the magnetic field generated by the annular coil 532 and the two symmetrically arranged magnets 531 interact to drive the focusing lens group 20 to move along the optical axis of the camera module in a balanced manner through the support part 52, so as to avoid the focusing lens group 20 from tilting when being driven, thereby ensuring the optical performance of the camera module.

[0072] Preferably, the support portion 52 forms an annular winding groove 5203 on the outer support side 5201, wherein the coil 532 is wound around the winding groove 5203 of the support portion 52 to ensure that the coil 532 is fixedly disposed on the outer support side 5201 of the support portion 52.

[0073] It is worth mentioning that the assembly method of the magnet 531 of the driving part 53 and the fixing part 51 is not limited in the optical lens 200 of the present invention. For example, the magnet 531 can be glued to the inner wall of the fixing part 51 so that the magnet 531 is fixedly disposed in the fixing part 51. (See attached...) Figures 1 to 5B In this preferred example of the optical lens 200 shown, the fixing part 51 has at least one mounting groove 511, wherein the magnet 531 is mounted in the mounting groove 511 of the fixing part 51, and the magnet 531 is fixedly disposed in the mounting groove 511 of the fixing part 51.

[0074] Preferably, the fixing part 51 surrounds the lower lens group 30, so that the two magnets 531 are symmetrically arranged on opposite sides of the lower lens group 30. Correspondingly, the height position of the outer support 5201 of the support part 52 is lower than the height position of the inner support 5202. In this way, while ensuring that the focusing lens group 20 is held on the upper side of the lower lens group 30, the support part 52 allows the coil 532 wrapped around the outer support 5201 of the support part 52 to surround the lower lens group 30 and correspond to the magnet 531. In this way, the coil 532 of the drive mechanism 50 can be lowered, which helps to reduce the height of the camera module, thereby making the camera module suitable for electronic devices that pursue thinness and lightness.

[0075] For details, please refer to the appendix. Figures 1 to 5B The support portion 52 further includes a driven member 521, a support ring 522, and at least one extension arm 523 extending between the driven member 521 and the support ring 522. The driven member 521 is formed on the outer support side 5201 of the support portion 52 to allow the coil 532 of the drive portion 53 to be wound around the driven member 521. The support ring 522 forms the inner support side 5202 of the support portion 52 to allow the focusing lens group 20 to be fixedly disposed on the support ring 522. The extension arm 523 of the support portion 52 is movably disposed in the movable channel 47 of the housing 40, such that the driven member 521 and the support ring 522 of the support portion 52 can be respectively held on opposite sides of the mounting arm 46 of the housing 40.

[0076] Preferably, the support portion 52 includes two extension arms 523, which extend symmetrically between the driven member 521 and the support ring 522.

[0077] Preferably, the driven member 521, the carrying ring 522, and the two extension arms 523 of the carrying portion 52 can be an integral structure, such that one end of each of the two extension arms 523 extends to and is integrally connected to the driven member 521, and the other end extends to and is integrally connected to the carrying ring 522.

[0078] Preferably, at least a portion of the extension arm 523 of the support portion 52 is inclined, such that the height of the outer support side 5201 of the support portion 52 is lower than the height of the inner support side 5202, causing the coil 532 of the drive portion 53 to sink. In other words, the height of the driven member 521 of the support portion 52 is lower than the height of the support ring 522, such that the support portion 52 is configured to allow the driven member 521 to surround the lower lens group 30 and to keep the support ring 522 on the upper side of the lower lens group 30.

[0079] Specifically, see the attached document. Figure 1 , Figure 3A , Figure 3B , Figure 5A and Figure 5B The extension arm 523 of the support portion 52 has a lower horizontal extension portion 5231, an upper horizontal extension portion 5232, and an inclined extension portion 5233. The lower horizontal extension portion 5231 extends inward integrally from the driven member 521, and the upper horizontal extension portion 5232 extends outward integrally from the support ring 522. The opposite ends of the inclined extension portion 5233 extend to and are connected to the lower horizontal extension portion 5231 and the upper horizontal extension portion 5232, respectively. Thus, the height position of the driven member 521 of the support portion 52 is lower than the height position of the support ring 522, causing the coil 532 of the drive portion 53 to sink, which helps to reduce the height of the camera module.

[0080] In an optional example of the optical lens 200 of the present invention, the extension arm 523 of the carrier portion 52 is composed of the lower horizontal extension portion 5231 and the inclined extension portion 5233, wherein the lower horizontal extension portion 5231 extends integrally inward from the driven member 521, and the opposite ends of the inclined extension portion 5233 extend to and are connected to the lower horizontal extension portion 5231 and the carrier ring 522, respectively.

[0081] In another alternative example of the optical lens 200 of the present invention, the extension arm 523 of the support portion 52 is composed of the upper horizontal extension portion 5232 and the inclined extension portion 5233, wherein the upper inclined extension portion 5232 extends outward integrally from the support ring 522, and the opposite ends of the inclined extension portion 5233 extend to and are connected to the upper horizontal extension portion 5232 and the driven member 521, respectively.

[0082] In another alternative example of the optical lens 200 of the present invention, the extension arm 523 of the support portion 52 is inclined as a whole, that is, the opposite ends of the extension arm 523 extend to and are connected to the driven member 521 and the support ring 522 respectively in such an inclined manner as the extension arm 523 is inclined as a whole.

[0083] Furthermore, the drive mechanism 50 further includes a carrier 54, wherein the carrier 54 surrounds the second lens barrel 21 of the focusing lens group 20, and the carrier 54 is mounted on the carrier ring 522 of the carrier portion 52, and the focusing lens group 20 is fixedly mounted on the carrier portion 52 by the carrier 54.

[0084] Continue to refer to the appendix Figures 1 to 5B The housing 40 has at least one clearance space 48, which connects the housing space 41 and the top opening 42. The extension arm 523 of the support portion 52 corresponds to the clearance space 48 of the housing 40, allowing the housing 40 to avoid the extension arm 523 of the support portion 52. This allows the focusing lens group 20 to have a larger range of travel. It is understood that the width of the clearance space 48 of the housing 40 is slightly larger than the width of the extension arm 523 of the support portion 52. This prevents the extension arm 523 of the support portion 52 from contacting the housing 40 when the focusing lens group 20 is driven to move along the optical axis of the camera module, thus ensuring the reliability of the camera module.

[0085] Preferably, the housing 40 has two clearance spaces 48, which are symmetrically formed on opposite sides of the top opening 42, wherein each of the extension arms 523 of the support portion 52 corresponds to each of the clearance spaces 48 of the housing 40.

[0086] Furthermore, the optical lens 200 includes a cover 60 having a central perforation 61. The cover 60 is attached to the housing surface 44 of the housing 40 such that the upper lens group 10 is held in the central perforation 61 of the cover 60, and the cover 60 closes the clearance space 48 of the housing 40. In this way, dust and other contaminants can be prevented from entering the interior of the optical lens 200 through the clearance space 48 of the housing 40 of the optical lens 200, thus ensuring the reliability of the optical lens 200.

[0087] Furthermore, the optical lens 200 includes a base 70 having a light channel 71. The base 70 is mounted to the surround 45 of the housing 40 such that the lower lens group 30 corresponds to the light channel 71 of the base 70. Thus, the upper lens group 10, the housing 40, and the lens mount 70 form the general appearance of the optical lens 200. The base 70 of the optical lens 200 is mounted to the lens mount 103 of the photosensitive assembly 100, thereby arranging the optical lens 200 in the light-sensing path of the photosensitive assembly 100 to form the camera module.

[0088] Appendix Figure 6 A modified example of the camera module of the present invention is shown, with reference to the appendix. Figures 1 to 5B The difference between the camera module shown and the one in question is that, in the attached... Figure 6 In this specific example of the camera module shown, the housing 40 and the fixing part 51 of the drive mechanism 50 are an integral structure. In other words, the magnet 531 of the drive part 52 of the drive mechanism 50 can be directly and fixedly disposed on the housing 40, thereby further reducing the length and width dimensions of the camera module and reducing the overall volume of the camera module. The outer side of the spring piece 202 is directly fixed to the housing 40.

[0089] Appendix Figure 7 Another variation of the camera module of the present invention is shown, with reference to the appendix. Figures 1 to 5B The difference between the camera module shown and the one in question is that, in the attached... Figure 7 In this specific example of the camera module shown, the lower lens group 30 is directly and fixedly mounted on the base 70, so that the base 70 and the housing 40 cooperate to ensure the relative positional relationship between the lower lens group 30 and the upper lens group 10.

[0090] According to another aspect of the present invention, the present invention further provides a method for assembling the optical lens 200, wherein the assembly method includes the following steps:

[0091] (a) Allowing multiple lens groups 201 to be arranged substantially coaxially;

[0092] (b) Calibrate the gaps in the Z direction of these lens groups 201;

[0093] (c) The positions of the lens groups 201 in the XY directions are calibrated sequentially according to their sensitivity in the overall optical lens system, from low to high; and

[0094] (d) Assemble the calibrated lens group 201 to assemble the optical lens 200.

[0095] Preferably, the lens groups 201 are the upper lens group 10, the focusing lens group 20, and the lower lens group 30, respectively. The relative positions of the upper lens group 10 and the lower lens group 30 are fixed relative to each other by the housing 40. The focusing lens group 20 is suspended between the upper lens group 10 and the lower lens group 30 by the driving mechanism 50 and the spring piece 202 extending between the driving mechanism 50 and the housing 40.

[0096] Preferably, in the above method, firstly, using the lower lens group 30 as a reference, the gap in the Z direction of the focusing lens group 20 is calibrated; secondly, using the lower lens group 30 and the focusing lens group 20 as references, the gap in the Z direction of the upper lens group 10 is corrected; thirdly, using the lower lens group 30 as a reference, the position in the XY direction of the focusing lens group 20 is corrected; and finally, using the lower lens group 30 and the focusing lens group 20 as references, the position in the XY direction of the upper lens group 10 is corrected.

[0097] It is worth mentioning that the relationship between these lens groups 201 of the optical lens 200 is as follows: (1) the gap in the Z direction mainly affects the field curvature of the optical lens 200; (2) the position in the XY direction mainly affects the peak value of the optical lens 200; (3) the tilt between these lens groups 201 mainly affects the tilt and astigmatism of the optical lens 200.

[0098] Therefore, when designing the optical lens 200, it is necessary to consider the overall optical performance sensitivity of the optical lens 200 in a balanced way. This means avoiding situations where a specific lens or lens group 201 becomes overly sensitive due to the relationships between these lens groups 201, leading to a decrease in the overall optical performance of the optical lens 200 due to the high sensitivity of that lens or lens group 201. However, due to the different functions and optical powers of the lenses, there will inevitably be lens groups 201 with increasing sensitivity. Generally, the sensitivity of the lens groups 201 increases sequentially from the image side to the object side. That is, the sensitivity of the focusing lens group 20 is higher than that of the lower lens group 30, and the sensitivity of the upper lens group 10 is higher than that of the focusing lens group 20. Therefore, in the assembly method of the present invention, after calibrating the gaps in the Z direction of these lens groups 201, it is necessary to calibrate the positions in the XY directions of these lens groups 201 in order of increasing sensitivity, so as to ensure the overall optical performance of the optical lens 200.

[0099] According to another aspect of the present invention, the present invention further provides a method for assembling the optical lens 200, wherein the assembly method includes the following steps:

[0100] (A) The housing 40 is provided, wherein the housing 40 has the housing space 41 and the top opening 42 and the bottom opening 43 respectively communicating with the housing space 41;

[0101] (B) The drive mechanism 50, on which the focusing lens group 20 is assembled, is disposed in the housing 40 via the bottom opening 43 of the housing 40, so as to allow the focusing lens group 20 to be movably held in the housing space 41 of the housing 40 in a manner corresponding to the top opening 42 of the housing 40; and

[0102] (C) The lower lens group 30 is fixedly disposed in the housing space 43 of the housing 40 through the bottom opening 43 of the housing 40, and the upper lens group 10 is attached to the housing 40 to obtain the optical lens 200, wherein the upper lens group 10, the focusing lens group 20 and the lower lens group 30 are arranged sequentially along the optical axis of the optical lens 200.

[0103] Preferably, in step (C), firstly, the upper lens group 10 is pre-fixed to the housing 40; secondly, the upper lens group 10, the focusing lens group 20, and the lower lens group 30 are calibrated; and thirdly, the upper lens group 10 is fixed to the housing 40. The specific steps for calibrating the upper lens group 10, the focusing lens group 20, and the lower lens group 30 are as follows: firstly, using the lower lens group 30 as a reference, the gap in the Z direction of the focusing lens group 20 is calibrated; secondly, using the lower lens group 30 and the focusing lens group 20 as references, the gap in the Z direction of the upper lens group 10 is corrected; thirdly, using the lower lens group 30 as a reference, the position in the XY direction of the focusing lens group 20 is corrected; and finally, using the lower lens group 30 and the focusing lens group 20 as references, the position in the XY direction of the upper lens group 10 is corrected.

[0104] Preferably, in step (C), the driven member 521 of the support portion 52 of the drive mechanism 50 surrounds the outside of the lower lens group 30, so that the coil 532 of the drive portion 53 can be lowered, which helps to reduce the height of the optical lens 200, thereby reducing the height of the camera module.

[0105] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A method for assembling an optical lens, characterized in that, The assembly method includes the following steps: (a) Allows multiple lens groups to be set approximately on the same optical axis; (b) Calibrate the gaps in the Z direction of these lens groups; (c) The positions of the lens groups in the XY directions are calibrated sequentially according to the sensitivity of each lens group in the overall optical lens system from low to high; as well as (d) Assemble the calibrated lens groups to obtain the optical lens, wherein the lens groups are an upper lens group, a focusing lens group, and a lower lens group, wherein the upper lens group, the focusing lens group, and the lower lens group are arranged sequentially along the optical axis, wherein the fixing part of the drive mechanism of the optical lens surrounds the lower lens group, the magnets of the drive part of the drive mechanism are symmetrically arranged on opposite sides of the lower lens group, the drive coil of the drive part of the drive mechanism surrounds the lower lens group, and the drive coil corresponds to the magnets, wherein the lower lens group is mounted on two mounting arms of the housing of the optical lens, the two mounting arms extending downward from the inner wall of the housing in a spaced-apart manner, forming two movable channels between the two mounting arms, wherein the drive mechanism The carrier portion has a carrier outer side and a carrier inner side corresponding to the carrier outer side. The driving portion drives the carrier portion to move relative to the fixed portion from the carrier outer side. The focusing lens group is disposed on the carrier inner side of the carrier portion. The carrier portion includes a driven member, a carrier ring, and an extension arm extending between the driven member and the carrier ring. The driven member forms the carrier outer side of the carrier portion, and the carrier ring forms the carrier inner side of the carrier portion. The height position of the carrier outer side of the carrier portion is lower than the height position of the carrier inner side, so that the driving portion is positioned around the lower lens group. The extension arm is movably disposed in the movable channel. The driven member and the carrier ring are respectively held on opposite sides of the mounting arm.

2. The assembly method according to claim 1, wherein step (b) further comprises the step of: (b.1) Using the lower lens group as a reference, calibrate the gap in the Z direction of the focusing lens group; and (b.2) Using the lower lens group and the focusing lens group as a reference, correct the gap in the Z direction of the upper lens group; The step (c) further includes the step of: (c.1) Using the lower lens group as a reference, correct the position of the focusing lens group in the XY directions; and (c.2) Using the lower lens group and the focusing lens group as a reference, correct the position of the upper lens group in the XY direction.

3. The assembly method according to claim 2, wherein step (a) further comprises the step of: (a.1) A drive mechanism on which the focusing lens group is assembled is disposed in a housing space of the housing such that the focusing lens group corresponds to a top opening of a housing; (a.2) The lower lens group is fixedly disposed in the housing space of the housing in such a way that the lower lens group corresponds to the focusing lens group; as well as (a.3) The upper lens group is pre-fixed to the housing in such a way that the upper lens group corresponds to the top opening of the housing, so as to allow the upper lens group, the focusing lens group and the lower lens group to be arranged substantially coaxially.

4. The assembly method according to claim 3, wherein in step (a.1), at least one extension arm of the drive mechanism is allowed to correspond to at least one clearance space of the housing communicating with the top opening and the housing space.

5. The assembly method according to claim 4, wherein after calibrating the lower lens group, the focusing lens group and the upper lens group, a cover that is attached to the housing is allowed to close the clearance space.

6. A method for assembling an optical lens, characterized in that, The assembly method includes the following steps: (A) A housing is provided, wherein the housing has a housing space and a top opening and a bottom opening respectively communicating with the housing space; (B) A drive mechanism for assembling a focusing lens group is provided in the housing through the bottom opening of the housing, so as to allow the focusing lens group to be movably held in the housing space of the housing in a manner corresponding to the top opening of the housing; as well as (C) A lower lens group is fixedly disposed in the housing space of the housing through the bottom opening of the housing, and an upper lens group is attached to the housing to obtain the optical lens, wherein the upper lens group, the focusing lens group, and the lower lens group are arranged sequentially along the optical axis of the optical lens, wherein the fixing part of the driving mechanism of the optical lens surrounds the lower lens group, the magnets of the driving part of the driving mechanism are symmetrically disposed on opposite sides of the lower lens group, the driving coil of the driving part of the driving mechanism surrounds the lower lens group, and the driving coil corresponds to the magnets, wherein the lower lens group is mounted on two mounting arms of the housing of the optical lens, the two mounting arms extend downward from the inner wall of the housing in a spaced-apart manner, forming two movable channels between the two mounting arms, wherein The drive mechanism has a support portion having an outer support side and an inner support side corresponding to the outer support side. The drive portion drives the support portion to move relative to the fixed portion from the outer support side. The focusing lens group is disposed on the inner support side of the support portion. The support portion includes a driven member, a support ring, and an extension arm extending between the driven member and the support ring. The driven member forms the outer support side of the support portion, and the support ring forms the inner support side of the support portion. The height of the outer support side of the support portion is lower than the height of the inner support side, so that the drive portion is positioned around the lower lens group. The extension arm is movably disposed in the movable channel, and the driven member and the support ring are respectively held on opposite sides of the mounting arm.

7. The assembly method according to claim 6, wherein in step (C), firstly, the upper lens group is pre-fixed to the housing; secondly, the upper lens group, the focusing lens group, and the lower lens group are calibrated; and thirdly, the upper lens group is fixed to the housing.

8. The assembly method according to claim 7, wherein in the above method, firstly, the gap in the Z direction of the focusing lens group is calibrated based on the lower lens group; secondly, the gap in the Z direction of the upper lens group is corrected based on the lower lens group and the focusing lens group; thirdly, the position in the XY direction of the focusing lens group is corrected based on the lower lens group; and finally, the position in the XY direction of the upper lens group is corrected based on the lower lens group and the focusing lens group.

9. The assembly method according to any one of claims 6 to 8, wherein the housing is provided with at least one mounting arm and at least one movable channel communicating with opposite sides of the mounting arm in the housing space, wherein in step (B), at least one extension arm of the drive mechanism is movably held in the movable channel of the housing, wherein in step (C), the lower lens group is fixedly mounted to the mounting arm of the housing.

10. The assembly method according to any one of claims 6 to 8, wherein in step (C), the outer and inner sides of a base are respectively fixedly mounted to the housing and the lower lens group, so that the lower lens group is fixedly disposed in the housing space of the housing by the base.

11. The assembly method according to any one of claims 6 to 8, wherein in step (C), a driven member of a carrier portion of the drive mechanism surrounds the outer side of the lower lens group.

12. The assembly method according to any one of claims 6 to 8, wherein in step (B), at least one extension arm of a bearing portion of the drive mechanism corresponds to at least one clearance space of the housing communicating with the top opening and the housing space.

13. The assembly method according to claim 12, wherein in step (C), a cover attached to the housing is allowed to close the clearance space.

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